2
As with all object pronouns, double object pronouns are placed before a conjugated verb, and the indirect object pronoun (IOP) Spanish direct and indirect object pronouns may be used together in the same sentence just as in English. As with most all pronoun use, the objective is to reduce the length, complexity, or redundancy of the language. Julián, ¿me traes la mantequilla? Julián, will you bring me the butter? Te la traigo en un momento. Ill bring it to you in a moment. IOP DOP precedes the direct object pronoun (DOP).

3
We also may place the pronouns after an infinitive or gerund (-ing), but both pronouns must remain adjacent (together) to each other, that is, both pronouns must come either in front of the conjugated verb or after the infinitive or gerund. Julián, ¿me traes la matequilla? Te la voy a traer en un momento. Voy a traértela en un momento. Te la estoy trayendo ahora mismo. Estoy trayéndotela ahora mismo. Notice that when the pronouns are placed after the infinitive or gerund, they are closed up to each other and to the verb. Note also the written accents that must be added.

4
el balón.tiraste Yo teel balón.tirélo. Tú melo. Yoel balón.tirélo. le se You cant le lo in Spanish! Le and les must change to se before lo, la, los or las. I threw the ball to you. You threw the ball to me. I threw the ball to him. I threw it to you. You threw it to me. I threw it to him. se lo, se la, se los, se las The context of the situation or the previous statement or question will clarify the meaning of se. Notice the following slide.